通过对微屈服强度、微蠕变抗力、热膨胀系数、导热系数等的测量，研究了不同方法处理的SiCw／Al复合材料的尺寸稳定性。结果表明：SiCw/Al复合材料尺寸稳定性优异，其尺寸稳定化处理以T5处理为好，而冷热循环处理降低其尺寸稳定性。通过位错密度、X射线应力分析等对所得结果进行了讨论． The dimensional stability of SiCw / Al composites treated by different methods was studied by measuring the micro-yield strength, creep resistance, thermal expansion coefficient and thermal conductivity. The results show that the SiCw / Al composites are excellent in dimensional stability, T5 treatment is the best for their dimensional stabilization, and their thermal stability is reduced by hot and cold cycles. The results were discussed by dislocation density, X-ray stress analysis and the like.